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Answer: “Mass in motion” is called momentum.
A body’s momentum is determined by multiplying its mass by its velocity.
In mathematics, this is denoted as:
p = mv
Where m is the body’s mass, v is its speed, and p is its momentum.
We know that the dot product of a scalar and a vector always yields a vector quantity since mass is a scalar quantity and velocity is a vector quantity.
Hence, momentum is a vector quantity.
